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目的探讨Ｂ超测量胎儿各径线的临床价值。方法将１００例单胎孕３７～４１周的孕妇产前３天内的Ｂ超测胎儿双顶径、股骨长、腹围、双肩径与生后３天内的新生儿各径线值比较，并进行其与新生儿体重的相关性的分析，应用双肩径预测巨大胎儿。结果不同性别胎儿的各径线不同。Ｂ超测量胎儿各径线与生后测量值有良好的符合性，且与新生儿体重呈正相关。结论：双肩径为１１０ｃｍ时巨大胎儿的诊断指数最好，对诊断巨大胎儿有帮助，从而减少肩难产的发生。
Objective To investigate the clinical value of B-ultrasound in measuring fetal diameter lines. Methods B-ultrasonography fetus biparietal diameter, femur length, abdominal circumference and shoulder diameter of 100 pregnant women with 37-41 weeks of singleton pregnancies were compared with the newborn’s diameter values within 3 days after birth An analysis of its correlation with newborn weight, using shoulder diameters to predict huge fetuses. Results Different sex fetuses have different diameters. B-ultrasound measurement of fetal diameter line with the measured value after birth have a good compliance, and with a positive correlation between newborn weight. Conclusion: The diagnosis index of huge fetus is the best when the shoulders diameter is 110cm, which helps to diagnose huge fetus, thus reducing the incidence of shoulder dystocia.